For the old format of GRE, remember as many words as possible, especially the 1000 high frequency words in the Barron's (the ones with solid circles and squares in front of them). Try pneumonic methods, like someone above suggested relating it to something funny or vulgar works better. Go online and take some practice tests but remember it's only the PowerPrep test that will actually reflect your real score. Take those as many times as you can until you start seeing same questions again. I took them 6 times and my final score was close to the median of those 6. 
You must know by now that getting the first 5-10 right will be the key to scoring high in the test.